So up until last week I was living by myself and I was able to control my Android TV perfectly fine through my Google Home Mini (power on/off, volume, spotify, etc.)

As of this week I moved in with my girlfriend and she also had Google Homes so we created a new house with all the Google Homes and the TV. However, now I am unable to do literally anything to the TV via the Google Home. Casting still works, but nothing else. I've tried uninstalling updates on the Google and Chromecast Built-In apps as well as logging out and back in to the TV and nothing.

Telling Google Home to turn off the TV results in "Sure", but then nothing happens.

Any ideas? This is so incredibly frustrating as it was working perfectly fine last week and I even had a speaker group going.